now john's name is on wanted posters in central america. we've got the strange story of the security guru now wanted for questioning in the murder case. >> reporter: the everyone they thought they knew is long gone. >> he's a very smart guy. very accomplished guy. >> he's a guy that has some dark demons. he took this photo, believed just a few months ago. he says that he had deteriorated from the repeated use of the bath salts, showing the psych yachtic behavior. that allowed him to do whatever he wants. unfortunately it is sometimes being very destructive. >> reporter: on sunday they found the body in the neighbor's home shot in the back of the head. he has since disappeared and wanted for questioning. in fact tonight, he's been calling a reporter at wired magazine who tweeted that he just called now. i'm at depth in hiding. i'll do whatever it takes to stay alive. >> he's going to say until proven guilty. but he is a man who has frightened his neighbors. people are scared of him. from the sale of his company in santa clara. but the local